JPH0456925B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a displacement detection touch sensor for dimension or position control. In particular, the present invention relates to a displacement detection touch sensor that can detect displacement in three-dimensional directions with one detection finger.

(Prior art) Displacement detection touch sensors used for conventional dimension or position control have been developed by the applicant in the patent application filed in 1983.
There is a three-dimensional touch sensor filed under No.-093533.

This three-dimensional touch sensor consists of a main body having four conical holes arranged at the vertices of a right-angled quadrilateral, a ball that engages with each of the conical holes, a leg whose end surface connects to each of these balls, and a body that convexes to the outside. a main shaft having an extended detection finger; a spring that acts on the main shaft and constantly presses the ball into the conical hole through the foot; It is composed of a touch sensor that operates when the touch sensor is tilted using the point of contact between the two and the foot as a fulcrum, and a case that holds the spring and the touch sensor and is connected and fastened to the main body.

(Problems to be Solved by the Invention) This touch sensor can detect displacement in three-dimensional directions necessary for dimension or position control using one detection finger and sensor, and is durable and reliable even under adverse environments. The touch sensor has a high level of accuracy, can be manufactured at low cost, and can function satisfactorily in some applications, but when higher precision is required in all three dimensions, the touch sensor is Since there is only one, it has the disadvantage that the direction cannot be determined.

(Means for Solving the Problems) In order to solve these problems, the present invention uses a plurality of touch sensors, which have already been applied for utility model registration in Utility Model Application No. 54-179088, and requires a detection finger. The configuration is such that it operates regulated in each direction. As a result, the direction of displacement can be reliably determined, and displacement in any direction can be detected uniformly and with high accuracy.

That is, as shown in FIGS. 1 to 5, in the present invention, a shaft 3 having a detection finger 2 at one end is inserted into a body 1 having a completely sealed structure, and a sensor 5 is inserted into the rear end with a return spring 4 interposed therebetween. The guide shaft 6 is disposed so as to be inserted into the guide shaft 6, and two pairs of pivots 8 and pivot bearings 9 are provided at right angles to the guide shaft 6 and the bearing 7 provided on the outer periphery thereof.

In addition, a spring 10 is provided between the rear row and the present invention 1.
Two pairs of roller guides 11 are in pressure contact with the guide shaft 6 from four directions with the two pairs of roller guides 11 interposed between them, and two pairs of sensors 12 fixed to the main body 1 are attached to the guide shaft 6 in the rear row.
A rubber boot 13 is provided on the protruding portion of the shaft 3.

(Function) When the detection finger 2 is displaced in the Z direction, the rear end of the shaft 3 operates the sensor 5 and outputs a displacement signal to a control circuit (not shown). When the displacement is removed, the detection finger 2 It is returned to its original position by a return spring 4.

Next, the detection finger 2 detects X, X', and Y,
When each of the guide shafts 6 is displaced in the Y' direction, the guide shaft 6 rotates in each direction using the pivot 8 and the pivot bearing 9 as fulcrums, and the opposing sensor 12 can be operated to output a displacement signal. When the displacement is removed, the roller guide 11 acts and the detection finger 2 returns to its original position.

(Embodiment) Next, a displacement detection touch sensor according to an embodiment of the present invention will be described in detail based on the drawings.

FIG. 1 is a front sectional view showing the configuration of a displacement detection touch sensor according to an embodiment of the present invention, FIG. 2 is a left side view thereof,
Figure 3 is A in Figure 1 showing the configuration of the rotation mechanism.
The arrow view, Figure 4 is the first diagram showing the configuration of the balance mechanism.
5 is a view taken along arrow B in the figure, and FIG. 5 is a view taken along arrow C in FIG. 1 showing the configuration of the displacement detection mechanism.

In the displacement detection touch sensor according to the embodiment of the present invention, a shaft 3 having a detection finger 2 at one end is linearly moved in the direction of the central axis of a body 1 having a sealed structure, via a return spring 4 to a guide shaft 6 having a sensor 5 at its rear end. A pair of first pivot bearings 9a and 8b support a pair of first pivots 8a and 8b embedded in both outer surfaces of the square guide shaft 6, in which a displacement detection shaft mechanism formed by freely inserting the shaft is disposed. 9b and a pair of second pivots 8c and 8d located perpendicular to the first pivots 8a and 8b; and a bearing 7 held in the main body 1 and supporting the second pivots 8c and 8d. It is equipped with a rotation mechanism consisting of a pair of second pivot bearings 9c and 9d, and in the rear row is rotatably in contact with the four outer surfaces of the guide shaft 6 via springs 10a, 10b, 10c and 10d. Roller guide 11a, 1
A balance mechanism consisting of 1b, 11c, and 11d is further arranged in the rear row, and sensors 12a, 12b, 12c, and 12d are fixed to the inner surface of the main body 1 and are provided facing each other on the four outer sides of the guide shaft 6.
A displacement detecting mechanism is provided with a rubber boot 13 at the portion where the shaft 3 protrudes from the main body 1.

The present invention is not necessarily limited to displacement detection in three-dimensional directions, and can be configured to suit the purpose by removing sensors corresponding to unnecessary dimensions or directions. for example,
If only the Y, Y, X, and X' directions are required,
All you have to do is remove the guide shaft 6 including the sensor 5.
Also, if only the Z, Y, and Y' directions are required,
Sensors 12c and 12d may be removed.

The operation of the embodiment of the present invention configured as described above will be explained. First, when the detection finger 2 is displaced in the Z direction, the shaft 3 moves linearly inside the guide shaft 6 due to an external force, operating the sensor 5 and outputting a displacement signal to a control circuit (not shown). When the external force due to displacement is removed, the return spring 4 acts to move the detection finger 2
is returned to its original position.

Next, when the detection finger 2 is displaced in the Y direction, the guide shaft 6 rotates around the second pivots 8c and 8d, operating the sensor 12a and outputting a displacement signal. When the external force due to the displacement is removed, the force of the spring 10a is applied to the guide shaft 6 via the roller guide 11a, and the detection finger 2 returns to the position where equilibrium is maintained with the opposing spring 10b, that is, the original position.

When the guide shaft 6 rotates or returns, the other pair of roller guides 11c and 11d roll on both sides of the guide shaft 6, and the springs 10c and 10
It functions to keep d always at the same position.

Similarly, when the detection finger 2 is displaced in the Y' direction, the guide shaft 6 rotates around the pivots 8c and 8d to support the sensor 12b, and when the detection finger 2 is displaced in the X direction, the guide shaft 6 rotates around the pivot 8a. and 8b as a fulcrum, and when the sensor 12c is received in the X' direction, the sensor 12d is similarly operated and a displacement signal is output. When the force due to displacement is removed from the detection finger 2, the roller guide 1
1a, 11b, 11c and 11d are springs 10
a, 10b, 10c and 10d act on the guide shaft, respectively, to return the detection finger 2 to its original position.

In this case as well, pivots 8a, 8b and 8c, 8
d and pivot shafts 9a, 9b, 9c, and 9d, the vertical and horizontal rotations are regulated in a fixed direction, so the direction can be completely determined regardless of the position and angle of the force acting on the detection finger 2. It will be done.

The main body 1 of the present invention has a sealed structure, and this main body 1
A rubber boot 13 is attached to the rotating part where the shaft 3 protrudes from the
It is completely dustproof and waterproof, and can withstand use in harsh environments.Since the main parts are built inside the strong body 1, it is also strong enough. have something.

(Effects of the Invention) As described above, according to the present invention, one detection finger can detect multidimensional
Displacement in multiple directions can be detected with extremely high accuracy, and since the detection finger is rod-shaped, it is possible to detect displacement in narrow places.Also, the sensor can be used even when multidimensional or multidirectional displacement detection is not required. Since the structure allows sensors to be installed individually in each direction, sensors can be installed as needed, and the price can be set according to the direction of displacement detection required, thereby eliminating unnecessary expenses. I can do it.

Furthermore, the built-in sensors can be attached and detached individually, making maintenance and inspection easy, reducing maintenance costs, and the main body is strong, dust-proof, and waterproof, making it suitable for use in adverse environments. It has many excellent effects such as being durable.

[Brief explanation of the drawing]

FIG. 1 is a sectional front view showing the configuration of a displacement detection touch sensor according to an embodiment of the present invention. FIG. 2 is a left side view showing the configuration of a displacement detection touch sensor according to an embodiment of the present invention. Third
This figure is a view taken along arrow A in FIG. 1, showing the configuration of a rotating mechanism according to an embodiment of the present invention. FIG. 4 is a view taken along arrow B in FIG. 1, showing the configuration of the balance mechanism according to the embodiment of the present invention. Fifth
The figure shows the configuration of the displacement detection mechanism according to the embodiment of the present invention.
C arrow view in the figure. 1...Body, 2...Detection finger, 3...Axis,
4... Return spring, 5, 12a, 12b, 12c,
12d...Sensor, 6...Guide shaft, 7...Bearing, 8a, 8b, 8c, 8d...Pivot, 9
a, 9b, 9c, 9d...Pivot bearing, 10
a, 10b, 10c, 10d... spring, 11a,
11b, 11c, 11d...Guide roller, 13
...Rubber boots.

Claims (1)

[Scope of Claims] 1. A main body having a sealed structure, a shaft having a detection finger at one end installed inside the main body, a square guide shaft that is inserted through the shaft so as to be movable in a linear manner, and the above-mentioned detection of the guide shaft. a length displacement detection mechanism including a sensor for detecting displacement in the longitudinal direction of the shaft and a return spring for returning the shaft to its original position, at an end opposite to the direction in which the fingers are located; and an outer facing surface of the guide shaft. a pair of first pivot bearings that rotatably support the pair of first pivots embedded in the shaft; and a pair of first pivot bearings that rotatably support the pair of first pivots; A pair of second pivots are provided on the outer surface of the first pivot bearing so as to face each other in a direction perpendicular to the opposing direction of the second pivot bearing, and a second pivot bearing rotatably supports the pair of second pivots. A rotation mechanism that is provided in the main body to support the shaft so as to rotate in two orthogonal directions when viewed from the length direction of the same shaft; and a rotation mechanism that allows the guide shaft to be displaced in two independent directions by the rotation mechanism. A rotary detection/displacement mechanism consisting of four sensors installed on the main body to detect
A displacement detection touch sensor, comprising: a balance mechanism consisting of four roller guides that restrict the rotation of the rotational displacement detection mechanism and provide a return force to the original position by the rolling of the rotational displacement detection mechanism. 2. Claim 1, wherein the length displacement detection mechanism and the rotational displacement detection mechanism have four or less sensors.
Displacement detection touch sensor described in section.